Melee (0-350), Life Drain Berserk looks like red musical notes (0-165+), Summons 2 War Wolves at once (white notes), Turns you into a Werewolf (blue notes), Reduces the shielding and fighting skill in approximately 35%, Self-Healing (green shimmer), Haste (purple notes).
Try to kill its summons first as they can nearly double the damage to a Player if their shielding is broken. Since Werewolves can respawn War Wolves again very fast the best idea is to use Ice Wave or Fire Wave by mage, while knight is blocking.